|1.||[ noun ] (physics) radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays|
|Synonyms:||ultraviolet_light ultraviolet_radiation ultraviolet_illumination UV|
|Related terms:||actinic_radiation sun-ray|
|2.||[ adjective ] having or employing wavelengths shorter than light but longer than X-rays; lying outside the visible spectrum at its violet end|
"ultraviolet radiation" "an ultraviolet lamp"